Hearing aid



Figure 1.1 is a perspective view of a hearing device

Figure 1.2 is a front view thereof;

Figure 1.3 is a back view thereof;

Figure 1.4 is a top view thereof;

Figure 1.5 is a bottom view thereof;

Figure 1.6 is a left view thereof; and

Figure 1.7 is a right view thereof.

The broken lines shown in the figures 1.1-1.7 illustrate portions of the hearing device that form no part of the claimed design. 

CLAIM The ornamental design for a hearing aid, as shown and described. 